I know that this probably may not be a bug but shouldn't the lykos be mentioned about in the Beast Codex section by now? It's been quite a long time since their arrival to the game. Althought their genes and skins library did open but their Codex....well not yet?

I don't think this is a bug, Moon, it's simply the developers had't added their Codex entry yet for one reason or another. I too am dying to know their lore, and specially their size since I want to draw them, but I think our only option is to wait until it's released.

they havent added very many creatures AT ALL as well as to the monster codex. therefor its not a glitch. they just havent. (yet?)